The answer for 1 is assimilation
That's when you adopt the cultural tradition of the host country in order to be more like them.
The answer for 2 is pluralism
They keep their own beliefs and traditions and establish neighborhoods where they don't have to be assimilated.
Answer:
Except a e i o u I will hold all other variables constant
Answer: Asia (Beringia)
Explanation: The ancestors of living Native Americans arrived in what is now the United States at least 15,000 years ago, possibly much earlier, from Asia via Beringia.